r'''
Copyright 2014 Google Inc. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
'''
import struct


class CompressionMethod(object):

    def __init__(self, value):
        self.value = value

    @property
    def name(self):
        return name_map.get(self.value)

    @staticmethod
    def from_stream(body):
        value = struct.unpack_from("B", body, 0)[0]
        return CompressionMethod(value), 1

    def __str__(self):
        name = self.name
        if name:
            return name
        else:
            return "0x%x" % self.value

    def to_bytes(self):
        return struct.pack("B", self.value)

name_map = {
    0: "null",
    1: "DEFLATE",
}

